Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Dimension & Clearance Specifications - Valve Seat

Face Angle 45°
Seat Angle 45°
Minimum Margin 0.635 mm (0.025 inch)
Seat Runout-Maximum 0.050 mm (0.002 inch)
Seat Width-Intake 1.53 - 2.03 mm (0.060 - 0.080 inch)
Seat Width-Exhaust 2.29 - 2.79 (0.090 - 0.110 inch)